title: Effect of oxic/anoxic switches on bacterial communities and PAH biodegradation in an oil-contaminated sludge.
abstract: OBJECTIVE
  We studied the effect of alternations of aeration on both the autochthonous bacterial communities from an oily sludge to the endogenous polycyclic aromatic hydrocarbons (PAH) biodegradation compared to a permanent oxic condition.
  
  
  METHODS
  Genomic and transcriptional analyses associated with chemical measurements were used to assess the dynamics of bacteria coupled to PAH removal during an incubation of 26 days.
  
  
  CONCLUSIONS
  The autochthonous bacterial communities of an oil sludge showed a strong potential to adapt and degrade PAH when they were subjected to alternating anoxic/oxic conditions, as well as under an oxic condition. In addition, changes in the bacterial communities were related to the different phases of hydrocarbon degradation, and the removal efficiency of PAH was similar in both switching and permanent oxic conditions. This methodology could be useful for an alternative solution of oil sludge treatment with a low-cost processing, as its efficiency is similar to that of a permanent oxic incubation which is more expensive in oxygen supply.
authors.affiliation: Equipe Environnement et Microbiologie, IPREM UMR/CNRS 5254, Université de Pau, 64013 Pau Cedex, France.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Vitte
authors.forename: Robert
authors.initials: R
authors.lastname: Duran
authors.forename: Ronan
authors.initials: R
authors.lastname: Jézéquel
authors.forename: Pierre
authors.initials: P
authors.lastname: Caumette
authors.forename: Cristiana
authors.initials: C
authors.lastname: Cravo-Laureau
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D001419:Bacteria / Q000235:genetics / Q000378:metabolism*; D001673:Biodegradation, Environmental; D018533:Biomass; D004247:DNA / Q000302:isolation & purification; D015723:Gene Library; D009821:Oils / Q000378:metabolism; D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000378:metabolism; D012313:RNA / Q000302:isolation & purification; D017422:Sequence Analysis, DNA; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis* / Q000378:metabolism
chemical_list: D009821:Oils; D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons; D012722:Sewage; D012989:Soil Pollutants; D012313:RNA; D004247:DNA